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Miyako

W-Arch (Irabu)

  • Max depth18 m
  • CertificationOpen water / no overhead
  • Water temperature≈ 20–29 °C, varies with the seasonestimated, no reports yet
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Directions

Diving and fills

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What it looks like

All 1 videos and posts

Videos and posts

From other divers, via YouTube, Instagram and Facebook. They only load when you click; after that, Google's or Meta's privacy rules apply.

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Other people's footage, not advice: how someone else dives here says nothing about what suits your team. Dive within your training.

The dive

From some angles both arches look like a heart. There are many nudibranchs, and the site offers plenty of photo opportunities. Practical: the dive centre counts W-Arch among its easy sites and can dive it ~80% of the time.

Profile and sections

From some angles both arches look like a heart. There are many nudibranchs, and the site offers plenty of photo opportunities.

Practical: the dive centre counts W-Arch among its easy sites and can dive it ~80% of the time.

Source: BIGHOLIDAY – Irabujima dive sites ↗Source: BIGHOLIDAY – 伊良部島ダイビングポイント ↗
Depth and profile
To 18 m: two arches joined by a short cave.
Configuration
Arches with a short cave: recreational gear with the guide (estimate).
Who can dive where
  • CaveAt least Open water / no overhead
  • Whole caveConfigurations: Backmount / twinset / Sidemount / CCR / Small cylinders / no-mount (speleo sumps)
  • Whole caveGoes down to 18 m (trimix or deco may be needed) · doesn't decide who may dive
Entry or dive feeThrough a dive centre or guide

This is how the planner decides who in your team may dive this cave. Rules your own trip adds (organizer, a mail, the AI) show with your trip.

Source: BIGHOLIDAY – Irabujima dive sites ↗Source: BIGHOLIDAY – 伊良部島ダイビングポイント ↗

How to get there

Boat dive off Irabu with a local dive centre.

Plan your route ↗

Around W-Arch (Irabu)

FillsNo fill station known nearby
Other sites6

News

Access and rules change: check what applies locally right before your trip. Source: GDELT Project and the news feeds of diving magazines. Search for more news ↗ Searched automatically, last on 5 Nov 2026.

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Sources, sharing and disclaimer

Sources

Source: BIGHOLIDAY – Irabujima dive sites ↗Source: BIGHOLIDAY – 伊良部島ダイビングポイント ↗

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Certification requirements, configurations and trimix depths are estimates for planning. Always check them locally and dive within your training. Compiled from web research (Oct 2026): ja.wikipedia, showcaves.com, the dive centres' websites (BIGHOLIDAY, Sun Island, Aquatic Adventure), visitokinawajapan.com, nap-camp, skyticket, the prefectural Miyako hospital, Ryukyu Shimpo and DAN. Toriike pin from Wikipedia; the boat sites have none. These are guided boat dives into caverns, halls and arches; the requirements come from the dive centres. Certification and configurations are estimates.